Debt (Summary of Long-Term Debt) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Dec. 31, 2015	Dec. 09, 2015	Dec. 19, 2014	Dec. 24, 2013	Nov. 13, 2013	Jun. 18, 2013
Debt Instrument [Line Items]
Net debt carrying amount		$ 7,325.7	$ 7,294.3
Unamortized Debt Issuance Expense		(36.8)	(38.3)
Current portion of long-term debt		1,000.0	998.7
Long-term debt, excluding current maturities		6,325.7	6,295.6
Other
Debt Instrument [Line Items]
Net debt carrying amount		4.6	4.3
Term Loan | 2015 Term Loans
Debt Instrument [Line Items]
Net debt carrying amount		1,600.0	1,600.0
Term Loan | 2014 Term Loan
Debt Instrument [Line Items]
Net debt carrying amount		800.0	800.0		$ 800.0
Senior Notes | 2016 Senior Notes (1.800% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[1]							1.80%
Net debt carrying amount	[1]	$ 500.0	500.1
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.20%
Senior Notes | 2016 Senior Notes (1.350% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[2]						1.35%
Net debt carrying amount	[2]	$ 499.9	499.9
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.125%
Senior Notes | 2018 Senior Notes (2.600% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[3]							2.60%
Net debt carrying amount	[3]	$ 649.4	649.3
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.30%
Senior Notes | 2018 Senior Notes (3.000% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[3]			3.00%
Net debt carrying amount	[3]	$ 499.4	499.4
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.30%
Senior Notes | 2019 Senior Notes (2.550% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[4]						2.55%
Net debt carrying amount	[4]	$ 499.3	499.2
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.20%
Senior Notes | 2020 Senior Notes (3.750% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[5]			3.75%
Net debt carrying amount	[5]	$ 499.8	499.8
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.35%
Senior Notes | 2023 Senior Notes (3.125% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[4]					3.125%
Net debt carrying amount	[4]	$ 814.7	785.2
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.20%
Senior Notes | 2023 Senior Notes (4.200% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[6]						4.20%
Net debt carrying amount	[6]	$ 498.4	498.4
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.25%
Senior Notes | 2043 Senior Notes (5.400% coupon)
Debt Instrument [Line Items]
Stated percentage rate	[7]						5.40%
Net debt carrying amount	[7]	$ 497.0	$ 497.0
Equivalent percentage of redeemed amount		100.00%
Debt instrument, basis spread on variable rate		0.25%

[1] Instrument is callable by the Company at any time at the greater of 100% of the principal amount or the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.20% plus, in each case, accrued and unpaid interest. Instrument is due on June 24, 2016 and is included in current portion of long-term debt and other long-term obligations in the Condensed Consolidated Balance Sheets at March 31, 2016.

[2] Instrument is callable by the Company at any time at the greater of 100% of the principal amount or the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.125% plus, in each case, accrued and unpaid interest. Instrument is due on November 29, 2016 and is included in current portion of long-term debt and other long-term obligations in the Condensed Consolidated Balance Sheets at March 31, 2016.

[3] Instrument is callable by the Company at any time at the greater of 100% of the principal amount or the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.30% plus, in each case, accrued and unpaid interest.

[4] Instrument is callable by the Company at any time at the greater of 100% of the principal amount or the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.20% plus, in each case, accrued and unpaid interest.

[5] Instrument is callable by the Company at any time prior to the date that is one month prior to the instrument's maturity date at the greater of 100% of the principal amount or the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.35% plus, in each case, accrued and unpaid interest.

[6] Instrument is callable by the Company at any time prior to August 29, 2023 at the greater of 100% of the principal amount or the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.25% plus, in each case, accrued and unpaid interest.

[7] Instrument is callable by the Company at any time prior to May 29, 2043 at the greater of 100% of the principal amount or the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate plus 0.25% plus, in each case, accrued and unpaid interest. On or after such date, the instrument is callable by the Company at 100% of the principal amount plus accrued and unpaid interest.